BUGERA BVV3000 INFINIUM Hand-built 300-Watt bass amplifier head driven by 6 x 6550 tubes (now compatible with KT88, KT90, KT100, etc.) Vintage design from the '60s featuring 3 x 12AX7 and 2 x 12AU7 tubes for harmonically rich and vibrant tube sound Revolutionary INFINIUM Tube Life Multiplier technology: Extends the life of your amplifiers expensive power tubes up to 20 times. Provides incredible reliability and consistent tone over the complete lifespan of your tubes  No need for expensive matched tube sets Allows you to mix and match any combination of compatible tube types and brands  Monitors performance of each power tube continuously and displays defective tubes to allow for easy and individual replacement Voicing selector provides you with 5 classic sound variations to suit your playing style Dedicated Bass, Mid and Treble controls and High/Low switches for ultimate sound shaping